21130108321 has 8 divisors (see below), whose sum is σ = 24149724480. Its totient is φ = 18110749488.

The previous prime is 21130108313. The next prime is 21130108339. The reversal of 21130108321 is 12380103112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21130108321 - 2³ = 21130108313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130108292 and 21130108301.

It is not an unprimeable number, because it can be changed into a prime (21130108361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167190 + ... + 264976.

It is an arithmetic number, because the mean of its divisors is an integer number (3018715560).

Almost surely, 2^21130108321 is an apocalyptic number.

It is an amenable number.

21130108321 is a deficient number, since it is larger than the sum of its proper divisors (3019616159).

21130108321 is an equidigital number, since it uses as much as digits as its factorization.

21130108321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128663.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 21130108321 in words is "twenty-one billion, one hundred thirty million, one hundred eight thousand, three hundred twenty-one".